OLD SECOND BANCORP INC

OSBCNASDAQ

$24.95+0.32 (+1.30%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

OLD SECOND BANCORP INC price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+45.9%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	8.44%	$100M	0.00%	Not reported
Dimensional Fund Advisors LP	4.91%	$58.3M	0.01%	Not reported
Vanguard Capital Management LLC	4.28%	$50.8M	0.00%	Not reported
State Street Corp	3.61%	$42.9M	0.00%	Not reported
Davis Asset Management, L.P.	3.53%	$42M	1.06%	Not reported
American Century Companies Inc	3.50%	$41.6M	0.02%	Not reported
Goldman Sachs Group Inc	3.19%	$37.9M	0.00%	Not reported
FJ Capital Management LLC	2.87%	$34.1M	4.42%	Reduce 2.97%
Geode Capital Management, LLC	2.65%	$31.5M	0.00%	Not reported
Kennedy Capital Management LLC	2.43%	$28.8M	0.51%	Reduce 2.48%
Banc Funds Co LLC	2.03%	$24.1M	3.98%	Add 0.49%
Manufacturers Life Insurance Company, the	1.71%	$20.4M	0.02%	Not reported
Vanguard Portfolio Management LLC	1.61%	$19.1M	0.00%	Not reported
Stieven Capital Advisors, L.P.	1.60%	$19M	3.63%	Add 5.40%
River Street Advisors LLC	1.53%	$18.2M	5.35%	Add 4.33%
Alliancebernstein L.P.	1.26%	$12.9M	0.00%	Not reported
JPMorgan Chase & Co	1.09%	$12.9M	0.00%	Not reported
Northern Trust Corp	1.09%	$13M	0.00%	Not reported
Wellington Management Group LLP	1.07%	$12.7M	0.00%	Reduce 36.54%
Nuveen, LLC	0.97%	$11.5M	0.00%	Not reported
Bridgeway Capital Management, LLC	0.89%	$10.6M	0.19%	Not reported
Charles Schwab Investment Management Inc	0.85%	$10.1M	0.00%	Not reported
AQR Capital Management LLC	0.76%	$9.01M	0.00%	Not reported
Bank of America Corp	0.73%	$8.69M	0.00%	Not reported
Gator Capital Management, LLC	0.71%	$8.39M	1.76%	Add 2.35%
Bank of New York Mellon Corp	0.67%	$7.98M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.67%	$7.96M	0.00%	Not reported
Congress Asset Management Co	0.66%	$7.9M	0.05%	New Not reported
Morgan Stanley	0.62%	$7.42M	0.00%	Not reported
Citadel Advisors LLC	0.60%	$7.09M	0.00%	Not reported
Empowered Funds, LLC	0.49%	$5.8M	0.03%	Add 6.45%
Thrivent Financial for Lutherans	0.48%	$5.65M	0.01%	Add 69.28%
Mariner, LLC	0.44%	$5.25M	0.01%	Not reported
Arrowstreet Capital, Limited Partnership	0.41%	$4.91M	0.00%	Not reported
Forum Financial Management, LP	0.40%	$4.8M	0.06%	Add 0.01%
Great Lakes Advisors, LLC	0.40%	$4.76M	0.04%	Add 2.98%
Two Sigma Investments, LP	0.39%	$4.68M	0.00%	Not reported
Squarepoint Ops LLC	0.33%	$3.92M	0.00%	Not reported
Blair William & Co	0.32%	$3.81M	0.01%	Add 0.21%
Siena Capital Partners GP, LLC	0.32%	$3.81M	0.92%	Not reported
EJF Capital LP	0.30%	$3.53M	2.36%	Add 0.12%
UBS Group AG	0.29%	$3.43M	0.00%	Not reported
Victory Capital Management Inc	0.28%	$3.31M	0.00%	Not reported
Russell Investments Group, Ltd.	0.27%	$3.15M	0.00%	Not reported
Elizabeth Park Capital Advisors, Ltd.	0.25%	$3.02M	2.09%	Reduce 22.23%
Sei Investments Co	0.23%	$2.74M	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.22%	$2.67M	0.00%	Not reported
Curi Capital, LLC	0.20%	$2.34M	0.04%	Not reported
Swiss National Bank	0.20%	$2.34M	0.00%	Not reported
Mendon Capital Advisors Corp	0.20%	$2.33M	0.82%	Not reported

50 of 171 holders

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